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Mathematics

1 answer:

Nina [5.8K]3 years ago

3 0

Answer:

Step-by-step explanation:

(a) The appropriate formula is C = 2πr. Here r = 14 cm, so

C = 2π)14 cm = 28π cm, or (if we take π to be 22/7), C = 88 cm²

(b) We use the same circumference formula: C = 2πr and solve it for r before inserting numeric values:

C 132 m 7(132 m)

r = -------- and in this case, r = ------------------- = ------------- = 21 m

2π [ 2 * (22/7) ] 44

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